Improvement in pumps



J. R. GUSHIER.

Pump.

No. 222,250. Patented Dec. 2, |879.

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N Persia. PnoTo-IJTHOGRAFMER, WASHINGTON. D C

\ equal area and length-of stroke.

uNTTT'n STATES PATENT o-TT'Ton Joan-fn. cUsnHIEa'oF BELLPORT, New YORK.

lMPl'ioVl-:MENT IN PUMPS.

Specication forming part of Letters Patent No. 222,250, dated December 2, 1879; application tiled August l1, 1879.

To all whom it may concer/n.: Bc it known that I, JOHN R. CUsHIER, of

j Bellport, in the county of Suffolk and State of New York, have invented certain; new and useful Improvementsi-n. Pumps, of which the l following'is a speciiication.

My invention is specially adapted for deep well or mining pumps; and its object is to produce a pump which may be used in place of the Cornish pumps usually employed `for such purposes. 4Such Cornish pumps are furnished with a plunger7 which is forced down by' vmeans of a heavy, and oftem very long,

\ ranged between said cylinders, and stuffing or packing'boxes arranged at the lower ends of said cylinders, through which said plungers work. Y

It also consists in the combination, with two pumps arranged side by side?, a suction and discharge `valve for each pump, and a common discharge-pipe, of a pressure-valve arranged in said discharge-pipe, Vwhereby the discharge-valves of each pump are relieved of the pressure in said discharge-pipe at the commencement of thestro'ke. y

It also consists indet-ails and combinations of parts hereinafter described.

In the accompanying drawings, Figure l represents a vertical section of apair of pumps and a valve-chest therefor embodying my improvement-aand Fig. 2 represents an arrangement of two pairs of such pumps and mechanism for operating thev same. l

Similarletters of 'reference designate corresponding parts in both iigures.

A designates a pairy of pump-plungers of Although it is not necessary that they should be exactly -of equal area, I prefer-that they should be so in order that one may balance the other. These plungers work in cylinders B, arranged side by side through stuffing-boxes C in the lower ends of said cylinders.

D designates piston-rods extending upward from the plnngers and passing through stuffing-boxes E in the top heads of thepump-cylinders B. n

The piston-rods D may have connected to them cha-ins a or wire-rope` connections, for imparting motion to the plungers from'any suitable mechanism arranged above the pump, or for connecting together the plungers of `two or more pairs of pumps, arranged one above the other, as represented in Fig. 2. Such an O O, each of which is in free communication with one of the cylinders B by means of apassage, c, and both compartments O communicate, through suction-valves d, with a compartment, G, which is in free communication with the common suction-pipe I, and, through discharge-valves c, with a compartment, G', which is in communication with the common discharge-pipe H.

When in use the plungers of the pumps are intended to perform their work while pulled upward by? means of ropes, chains, or other ilexible connections attached `to the 'lower cross-head or to the piston-rod D." n

In the common discharge-pipe H, I have represented an extra discharge-valve or pressure-valve, J. The weight of the water in the discharge-pipe is supported by this valve, and

the separate delivery-valves e are relieved of heavy pressure at the change of the stroke of` the pumps, and consequently will work moref quietly.

When the arrangement represented in, Fig.

2 is employed the chains a or wire ropes are used to connect the plunger A of veach pump with the piston-rod D of the pump next below it, 'and the piston-rods of the upper pair of pumps are connected, by means of chains a passing around guide-pulleys j', or other ilexible connections, with a walking-beam or T- bob, K, arranged at the mouth ol' the mine or Shaft. This walkin g-beam or bob is supported in a frame-work, L, in such manner that it may be rocked or oscillated by means of power applied through the connecting-rod M, and thereby serves to imparta simultaneous reciprocatin g motion in reverse directions to the plungers of the pumps with which its two ends are connected. The weight of the several plungers and connections upon the two ends ofthe beam or bob K should be equal, and as they will balance eachother in their ascent and descent, power is only necessary to raise the weight of water. This arrangement also renders the amount of power necessary to work the pulnps uniform, thus preventing all violent shocks and lessenin g the breakages to the machinery.

In place of the walking-beam or bob I may employ a shaft extending across the mouth of the mine-shaft, and having upon it two cranks set at opposite points, and to which the two series of pump plungers are connected by means of the chains a.

By my invention I provide a pump system in which, as the plungers are pulled upward instead of forced downward to their work, very light connections may be used, in which the work is very evenly distributed, so as not to subject the drivin g mechanism to any severe shocks, and in which the separate dischargevalves of each pump are relieved from the pressure of the water in the discharge-pipe by means of the pressure-valve common to both pumps.

What I claim as my invention, and .desire to secure by Letters Patent, is-

1. The combination, with two single-acting cylinders and plungers, of a Valve-chamber communicating with both said cylinders above said plungers, and arranged between said cylinders, and stut'tin g or packing boxes arranged at the lower ends of said cylinders, through which the said plungers work, substantially as specied.

2. The combination, with two pumps arranged side by side, a suction and discharge valve for each pump, anda common dischargepipe, of a pressure-valve arranged in said discharge-pipe and common to both pumps, substantially as and for the purpose specified.

3. The combination of the twin single-acting' pump-cylinders B B, the centrall y-arran ged valve-chamber, G, composed of two compartments, each containing suction and discharge valves d c, the common suction and discharge pipes H I, and the pressure-valve J, arranged in said discharge-pipe, substantially as specilied.

J. R. CUSHIER.

Witnesses:

FRnnK. HAYNEs, E. l. JEssUP. 

